#include "ares-test.h" #include "dns-proto.h" #include #include namespace ares { namespace test { TEST_F(DefaultChannelTest, GetServers) { std::vector servers = GetNameServers(channel_); if (verbose) { for (const std::string& server : servers) { std::cerr << "Nameserver: " << server << std::endl; } } } TEST_F(DefaultChannelTest, GetServersFailures) { EXPECT_EQ(ARES_SUCCESS, ares_set_servers_csv(channel_, "1.2.3.4,2.3.4.5")); struct ares_addr_node* servers = nullptr; SetAllocFail(1); EXPECT_EQ(ARES_ENOMEM, ares_get_servers(channel_, &servers)); SetAllocFail(2); EXPECT_EQ(ARES_ENOMEM, ares_get_servers(channel_, &servers)); EXPECT_EQ(ARES_ENODATA, ares_get_servers(nullptr, &servers)); } TEST_F(DefaultChannelTest, SetServers) { EXPECT_EQ(ARES_SUCCESS, ares_set_servers(channel_, nullptr)); std::vector empty; EXPECT_EQ(empty, GetNameServers(channel_)); struct ares_addr_node server1; struct ares_addr_node server2; server1.next = &server2; server1.family = AF_INET; server1.addr.addr4.s_addr = htonl(0x01020304); server2.next = nullptr; server2.family = AF_INET; server2.addr.addr4.s_addr = htonl(0x02030405); EXPECT_EQ(ARES_ENODATA, ares_set_servers(nullptr, &server1)); EXPECT_EQ(ARES_SUCCESS, ares_set_servers(channel_, &server1)); std::vector expected = {"1.2.3.4", "2.3.4.5"}; EXPECT_EQ(expected, GetNameServers(channel_)); } TEST_F(DefaultChannelTest, SetServersPorts) { EXPECT_EQ(ARES_SUCCESS, ares_set_servers_ports(channel_, nullptr)); std::vector empty; EXPECT_EQ(empty, GetNameServers(channel_)); struct ares_addr_port_node server1; struct ares_addr_port_node server2; server1.next = &server2; server1.family = AF_INET; server1.addr.addr4.s_addr = htonl(0x01020304); server1.udp_port = 111; server1.tcp_port = 111; server2.next = nullptr; server2.family = AF_INET; server2.addr.addr4.s_addr = htonl(0x02030405); server2.udp_port = 0; server2.tcp_port = 0;; EXPECT_EQ(ARES_ENODATA, ares_set_servers_ports(nullptr, &server1)); EXPECT_EQ(ARES_SUCCESS, ares_set_servers_ports(channel_, &server1)); std::vector expected = {"1.2.3.4:111", "2.3.4.5"}; EXPECT_EQ(expected, GetNameServers(channel_)); } TEST_F(DefaultChannelTest, SetServersCSV) { EXPECT_EQ(ARES_ENODATA, ares_set_servers_csv(nullptr, "1.2.3.4")); EXPECT_EQ(ARES_ENODATA, ares_set_servers_csv(nullptr, "xyzzy,plugh")); EXPECT_EQ(ARES_ENODATA, ares_set_servers_csv(nullptr, "256.1.2.3")); EXPECT_EQ(ARES_ENODATA, ares_set_servers_csv(nullptr, "1.2.3.4.5")); EXPECT_EQ(ARES_ENODATA, ares_set_servers_csv(nullptr, "1:2:3:4:5")); EXPECT_EQ(ARES_SUCCESS, ares_set_servers_csv(channel_, "1.2.3.4,0102:0304:0506:0708:0910:1112:1314:1516,2.3.4.5")); std::vector expected = {"1.2.3.4", "0102:0304:0506:0708:0910:1112:1314:1516", "2.3.4.5"}; EXPECT_EQ(expected, GetNameServers(channel_)); // Same, with spaces EXPECT_EQ(ARES_EBADSTR, ares_set_servers_csv(channel_, "1.2.3.4 , 0102:0304:0506:0708:0910:1112:1314:1516, 2.3.4.5")); // Same, with ports EXPECT_EQ(ARES_SUCCESS, ares_set_servers_csv(channel_, "1.2.3.4:54,[0102:0304:0506:0708:0910:1112:1314:1516]:80,2.3.4.5:55")); EXPECT_EQ(expected, GetNameServers(channel_)); EXPECT_EQ(ARES_SUCCESS, ares_set_servers_ports_csv(channel_, "1.2.3.4:54,[0102:0304:0506:0708:0910:1112:1314:1516]:80,2.3.4.5:55")); std::vector expected2 = {"1.2.3.4:54", "[0102:0304:0506:0708:0910:1112:1314:1516]:80", "2.3.4.5:55"}; EXPECT_EQ(expected2, GetNameServers(channel_)); // Should survive duplication ares_channel channel2; EXPECT_EQ(ARES_SUCCESS, ares_dup(&channel2, channel_)); EXPECT_EQ(expected2, GetNameServers(channel2)); ares_destroy(channel2); // Allocation failure cases for (int fail = 1; fail <= 5; fail++) { SetAllocFail(fail); EXPECT_EQ(ARES_ENOMEM, ares_set_servers_csv(channel_, "1.2.3.4,0102:0304:0506:0708:0910:1112:1314:1516,2.3.4.5")); } // Blank servers EXPECT_EQ(ARES_SUCCESS, ares_set_servers_csv(channel_, "")); std::vector none; EXPECT_EQ(none, GetNameServers(channel_)); EXPECT_EQ(ARES_EBADSTR, ares_set_servers_csv(channel_, "2.3.4.5,1.2.3.4:,3.4.5.6")); EXPECT_EQ(ARES_EBADSTR, ares_set_servers_csv(channel_, "2.3.4.5,1.2.3.4:Z,3.4.5.6")); } TEST_F(DefaultChannelTest, TimeoutValue) { struct timeval tinfo; tinfo.tv_sec = 0; tinfo.tv_usec = 0; struct timeval tmax; tmax.tv_sec = 0; tmax.tv_usec = 10; struct timeval* pt; // No timers => get max back. pt = ares_timeout(channel_, &tmax, &tinfo); EXPECT_EQ(&tmax, pt); EXPECT_EQ(0, pt->tv_sec); EXPECT_EQ(10, pt->tv_usec); pt = ares_timeout(channel_, nullptr, &tinfo); EXPECT_EQ(nullptr, pt); HostResult result; ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result); // Now there's a timer running. pt = ares_timeout(channel_, &tmax, &tinfo); EXPECT_EQ(&tmax, pt); EXPECT_EQ(0, pt->tv_sec); EXPECT_EQ(10, pt->tv_usec); tmax.tv_sec = 100; pt = ares_timeout(channel_, &tmax, &tinfo); EXPECT_EQ(&tinfo, pt); pt = ares_timeout(channel_, nullptr, &tinfo); EXPECT_EQ(&tinfo, pt); Process(); } TEST_F(LibraryTest, InetNtoP) { struct in_addr addr; addr.s_addr = htonl(0x01020304); char buffer[256]; EXPECT_EQ(buffer, ares_inet_ntop(AF_INET, &addr, buffer, sizeof(buffer))); EXPECT_EQ("1.2.3.4", std::string(buffer)); } TEST_F(LibraryTest, Mkquery) { byte* p; int len; ares_mkquery("example.com", ns_c_in, ns_t_a, 0x1234, 0, &p, &len); std::vector data(p, p + len); ares_free_string(p); std::string actual = PacketToString(data); DNSPacket pkt; pkt.set_qid(0x1234).add_question(new DNSQuestion("example.com", ns_t_a)); std::string expected = PacketToString(pkt.data()); EXPECT_EQ(expected, actual); } TEST_F(LibraryTest, CreateQuery) { byte* p; int len; EXPECT_EQ(ARES_SUCCESS, ares_create_query("exam\\@le.com", ns_c_in, ns_t_a, 0x1234, 0, &p, &len, 0)); std::vector data(p, p + len); ares_free_string(p); std::string actual = PacketToString(data); DNSPacket pkt; pkt.set_qid(0x1234).add_question(new DNSQuestion("exam@le.com", ns_t_a)); std::string expected = PacketToString(pkt.data()); EXPECT_EQ(expected, actual); } TEST_F(LibraryTest, CreateQueryTrailingEscapedDot) { byte* p; int len; EXPECT_EQ(ARES_SUCCESS, ares_create_query("example.com\\.", ns_c_in, ns_t_a, 0x1234, 0, &p, &len, 0)); std::vector data(p, p + len); ares_free_string(p); std::string actual = PacketToString(data); EXPECT_EQ("REQ QRY Q:{'example.com\\.' IN A}", actual); } TEST_F(LibraryTest, CreateQueryNameTooLong) { byte* p; int len; EXPECT_EQ(ARES_EBADNAME, ares_create_query( "a1234567890123456789.b1234567890123456789.c1234567890123456789.d1234567890123456789." "a1234567890123456789.b1234567890123456789.c1234567890123456789.d1234567890123456789." "a1234567890123456789.b1234567890123456789.c1234567890123456789.d1234567890123456789." "x1234567890123456789.y1234567890123456789.", ns_c_in, ns_t_a, 0x1234, 0, &p, &len, 0)); } TEST_F(LibraryTest, CreateQueryFailures) { byte* p; int len; // RC1035 has a 255 byte limit on names. std::string longname; for (int ii = 0; ii < 17; ii++) { longname += "fedcba9876543210"; } p = nullptr; EXPECT_EQ(ARES_EBADNAME, ares_create_query(longname.c_str(), ns_c_in, ns_t_a, 0x1234, 0, &p, &len, 0)); if (p) ares_free_string(p); SetAllocFail(1); p = nullptr; EXPECT_EQ(ARES_ENOMEM, ares_create_query("example.com", ns_c_in, ns_t_a, 0x1234, 0, &p, &len, 0)); if (p) ares_free_string(p); // 63-char limit on a single label std::string longlabel = "a.a123456789b123456789c123456789d123456789e123456789f123456789g123456789.org"; p = nullptr; EXPECT_EQ(ARES_EBADNAME, ares_create_query(longlabel.c_str(), ns_c_in, ns_t_a, 0x1234, 0, &p, &len, 0)); if (p) ares_free_string(p); // Empty non-terminal label p = nullptr; EXPECT_EQ(ARES_EBADNAME, ares_create_query("example..com", ns_c_in, ns_t_a, 0x1234, 0, &p, &len, 0)); if (p) ares_free_string(p); } TEST_F(DefaultChannelTest, SendFailure) { unsigned char buf[2]; SearchResult result; ares_send(channel_, buf, sizeof(buf), SearchCallback, &result); EXPECT_TRUE(result.done_); EXPECT_EQ(ARES_EBADQUERY, result.status_); } std::string ExpandName(const std::vector& data, int offset, long *enclen) { char *name = nullptr; int rc = ares_expand_name(data.data() + offset, data.data(), data.size(), &name, enclen); EXPECT_EQ(ARES_SUCCESS, rc); std::string result; if (rc == ARES_SUCCESS) { result = name; } else { result = ""; } free(name); return result; } TEST_F(LibraryTest, ExpandName) { long enclen; std::vector data1 = {1, 'a', 2, 'b', 'c', 3, 'd', 'e', 'f', 0}; EXPECT_EQ("a.bc.def", ExpandName(data1, 0, &enclen)); EXPECT_EQ(data1.size(), enclen); std::vector data2 = {0}; EXPECT_EQ("", ExpandName(data2, 0, &enclen)); EXPECT_EQ(1, enclen); // Complete name indirection std::vector data3 = {0x12, 0x23, 3, 'd', 'e', 'f', 0, 0xC0, 2}; EXPECT_EQ("def", ExpandName(data3, 2, &enclen)); EXPECT_EQ(5, enclen); EXPECT_EQ("def", ExpandName(data3, 7, &enclen)); EXPECT_EQ(2, enclen); // One label then indirection std::vector data4 = {0x12, 0x23, 3, 'd', 'e', 'f', 0, 1, 'a', 0xC0, 2}; EXPECT_EQ("def", ExpandName(data4, 2, &enclen)); EXPECT_EQ(5, enclen); EXPECT_EQ("a.def", ExpandName(data4, 7, &enclen)); EXPECT_EQ(4, enclen); // Two labels then indirection std::vector data5 = {0x12, 0x23, 3, 'd', 'e', 'f', 0, 1, 'a', 1, 'b', 0xC0, 2}; EXPECT_EQ("def", ExpandName(data5, 2, &enclen)); EXPECT_EQ(5, enclen); EXPECT_EQ("a.b.def", ExpandName(data5, 7, &enclen)); EXPECT_EQ(6, enclen); // Empty name, indirection to empty name std::vector data6 = {0x12, 0x23, 0, 0xC0, 2}; EXPECT_EQ("", ExpandName(data6, 2, &enclen)); EXPECT_EQ(1, enclen); EXPECT_EQ("", ExpandName(data6, 3, &enclen)); EXPECT_EQ(2, enclen); } TEST_F(LibraryTest, ExpandNameFailure) { std::vector data1 = {0x03, 'c', 'o', 'm', 0x00}; char *name = nullptr; long enclen; SetAllocFail(1); EXPECT_EQ(ARES_ENOMEM, ares_expand_name(data1.data(), data1.data(), data1.size(), &name, &enclen)); // Empty packet EXPECT_EQ(ARES_EBADNAME, ares_expand_name(data1.data(), data1.data(), 0, &name, &enclen)); // Start beyond enclosing data EXPECT_EQ(ARES_EBADNAME, ares_expand_name(data1.data() + data1.size(), data1.data(), data1.size(), &name, &enclen)); // Length beyond size of enclosing data std::vector data2a = {0x13, 'c', 'o', 'm', 0x00}; EXPECT_EQ(ARES_EBADNAME, ares_expand_name(data2a.data(), data2a.data(), data2a.size(), &name, &enclen)); std::vector data2b = {0x1}; EXPECT_EQ(ARES_EBADNAME, ares_expand_name(data2b.data(), data2b.data(), data2b.size(), &name, &enclen)); std::vector data2c = {0xC0}; EXPECT_EQ(ARES_EBADNAME, ares_expand_name(data2c.data(), data2c.data(), data2c.size(), &name, &enclen)); // Indirection beyond enclosing data std::vector data3a = {0xC0, 0x02}; EXPECT_EQ(ARES_EBADNAME, ares_expand_name(data3a.data(), data3a.data(), data3a.size(), &name, &enclen)); std::vector data3b = {0xC0, 0x0A, 'c', 'o', 'm', 0x00}; EXPECT_EQ(ARES_EBADNAME, ares_expand_name(data3b.data(), data3b.data(), data3b.size(), &name, &enclen)); // Invalid top bits in label length std::vector data4 = {0x03, 'c', 'o', 'm', 0x00, 0x80, 0x00}; EXPECT_EQ(ARES_EBADNAME, ares_expand_name(data4.data() + 5, data4.data(), data4.size(), &name, &enclen)); // Label too long: 64-byte label, with invalid top 2 bits of length (01). std::vector data5 = {0x40, '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 0x00}; EXPECT_EQ(ARES_EBADNAME, ares_expand_name(data5.data(), data5.data(), data5.size(), &name, &enclen)) << name; // Incomplete indirect length std::vector data6 = {0x03, 'c', 'o', 'm', 0x00, 0xC0}; EXPECT_EQ(ARES_EBADNAME, ares_expand_name(data6.data() + 5, data6.data(), data6.size(), &name, &enclen)); // Indirection loops std::vector data7 = {0xC0, 0x02, 0xC0, 0x00}; EXPECT_EQ(ARES_EBADNAME, ares_expand_name(data7.data(), data7.data(), data7.size(), &name, &enclen)); std::vector data8 = {3, 'd', 'e', 'f', 0xC0, 0x08, 0x00, 0x00, 3, 'a', 'b', 'c', 0xC0, 0x00}; EXPECT_EQ(ARES_EBADNAME, ares_expand_name(data8.data(), data8.data(), data8.size(), &name, &enclen)); std::vector data9 = {0x12, 0x23, // start 2 bytes in 3, 'd', 'e', 'f', 0xC0, 0x02}; EXPECT_EQ(ARES_EBADNAME, ares_expand_name(data9.data() + 2, data9.data(), data9.size(), &name, &enclen)); } TEST_F(LibraryTest, CreateEDNSQuery) { byte* p; int len; EXPECT_EQ(ARES_SUCCESS, ares_create_query("example.com", ns_c_in, ns_t_a, 0x1234, 0, &p, &len, 1280)); std::vector data(p, p + len); ares_free_string(p); std::string actual = PacketToString(data); DNSPacket pkt; pkt.set_qid(0x1234).add_question(new DNSQuestion("example.com", ns_t_a)) .add_additional(new DNSOptRR(0, 1280)); std::string expected = PacketToString(pkt.data()); EXPECT_EQ(expected, actual); } TEST_F(LibraryTest, CreateRootQuery) { byte* p; int len; ares_create_query(".", ns_c_in, ns_t_a, 0x1234, 0, &p, &len, 0); std::vector data(p, p + len); ares_free_string(p); std::string actual = PacketToString(data); DNSPacket pkt; pkt.set_qid(0x1234).add_question(new DNSQuestion("", ns_t_a)); std::string expected = PacketToString(pkt.data()); EXPECT_EQ(expected, actual); } TEST_F(LibraryTest, Version) { // Assume linked to same version EXPECT_EQ(std::string(ARES_VERSION_STR), std::string(ares_version(nullptr))); int version; ares_version(&version); EXPECT_EQ(ARES_VERSION, version); } TEST_F(LibraryTest, Strerror) { EXPECT_EQ("Successful completion", std::string(ares_strerror(ARES_SUCCESS))); EXPECT_EQ("DNS query cancelled", std::string(ares_strerror(ARES_ECANCELLED))); EXPECT_EQ("unknown", std::string(ares_strerror(99))); } TEST_F(LibraryTest, ExpandString) { std::vector s1 = { 3, 'a', 'b', 'c'}; char* result = nullptr; long len; EXPECT_EQ(ARES_SUCCESS, ares_expand_string(s1.data(), s1.data(), s1.size(), (unsigned char**)&result, &len)); EXPECT_EQ("abc", std::string(result)); EXPECT_EQ(1 + 3, len); // amount of data consumed includes 1 byte len free(result); result = nullptr; EXPECT_EQ(ARES_EBADSTR, ares_expand_string(s1.data() + 1, s1.data(), s1.size(), (unsigned char**)&result, &len)); EXPECT_EQ(ARES_EBADSTR, ares_expand_string(s1.data() + 4, s1.data(), s1.size(), (unsigned char**)&result, &len)); SetAllocSizeFail(3 + 1); EXPECT_EQ(ARES_ENOMEM, ares_expand_string(s1.data(), s1.data(), s1.size(), (unsigned char**)&result, &len)); } } // namespace test } // namespace ares